To resolve this issue, install the latest version of the Windows Installer service. To install the latest version of the Windows Installer, connect to the Windows Update website (http://update.microsoft.com

This issue occurs when you don't have the latest version of the Microsoft Windows Installer (MSI) service installed on your computer. The Windows Installer service is a required component for the Office 365 Desktop Setup Tool. The Windows Installer service helps install the required updates. You must be running the latest version of the service to complete these installations.